Arch Linux is one of my favorite Linux-based desktop OSes. I have written at length why I use Arch Linux. If you want an OS that gives you complete control over your computing, Arch Linux is the one.

I've been using FreeBSD for years for server applications and I've played a bit with Ubuntu as a desktop OS now and again. But I like the minimalism of Arch Linux, so I'm looking to give that a whirl.